[Inhibition of passive cutaneous anaphylaxis by dipeptides]

The action of some dipeptides (Lalpha-alanyl-histidine, Lbeta-alanyl-histidine, histidyl-leicine and glycyl-histidine), and histidine on passive cutaneous anaphylaxis of guinea pigs was studied. Lbeta-alanyl-histidine (karnosine) and Lalpha-alanyl-histidine proved to inhibit the passive cutaneous anaphylaxis. Histidyl-leicine, glycyl-histidine, and histidine failed to produce any inhibitory effect on passive cutaneous anaphylaxis.